‘73 dart swinger 3 speed manual trans convert to 4 speed

hey all!
I am looking into swapping the original 3 speed manual(floor shifted) transmission out of my 1973 dart swinger special for a 4 speed(a833). I was wondering if there is a specific version of the A833 I will need to find to fit into my A body, or if they all fit universally. The car currently has a late 70s 360 cu. in. Motor. I plan on keeping it small block powered, whether it be in 340 or built 318 flavor(depending on the cash situation). The rearend is currently an 8 1/4 inch open diff. Which I plan on either building up with posi Trac or swapping for and 8 3/4”. And information would be appreciated! Thanks.